1 /*
2  * Copyright (c) 1996, Gary J. Palmer
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer,
11  *    verbatim and that no modifications are made prior to this
12  *    point in the file.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * $FreeBSD$
30  */
31 
32 /*
33  * ctm_dequeue:  Dequeue queued delta pieces and mail them.
34  *
35  * The pieces have already been packaged up as mail messages by ctm_smail,
36  * and will be simply passed to sendmail in alphabetical order.
37  */
38 
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43 #include <fcntl.h>
44 #include <sys/types.h>
45 #include <sys/stat.h>
46 #include <sys/wait.h>
47 #include <fts.h>
48 #include <limits.h>
49 #include <errno.h>
50 #include <paths.h>
51 #include "error.h"
52 #include "options.h"
53 
54 #define DEFAULT_NUM	1	/* Default number of pieces mailed per run. */
55 
56 int fts_sort(const FTSENT * const *, const FTSENT * const *);
57 int run_sendmail(int ifd);
58 
59 int
60 main(int argc, char **argv)
61 {
62     char *log_file = NULL;
63     char *queue_dir = NULL;
64     char *list[2];
65     int num_to_send = DEFAULT_NUM, chunk;
66     int fd;
67     FTS *fts;
68     FTSENT *ftsent;
69     int piece, npieces;
70     char filename[PATH_MAX];
71 
72     err_prog_name(argv[0]);
73 
74     OPTIONS("[-l log] [-n num] queuedir")
75 	NUMBER('n', num_to_send)
76 	STRING('l', log_file)
77     ENDOPTS
78 
79     if (argc != 2)
80 	usage();
81 
82     if (log_file)
83 	err_set_log(log_file);
84 
85     queue_dir = argv[1];
86     list[0] = queue_dir;
87     list[1] = NULL;
88 
89     fts = fts_open(list, FTS_PHYSICAL|FTS_COMFOLLOW, fts_sort);
90     if (fts == NULL)
91     {
92 	err("fts failed on `%s'", queue_dir);
93 	exit(1);
94     }
95 
96     ftsent = fts_read(fts);
97     if (ftsent == NULL || ftsent->fts_info != FTS_D)
98     {
99 	err("not a directory: %s", queue_dir);
100 	exit(1);
101     }
102 
103     ftsent = fts_children(fts, 0);
104     if (ftsent == NULL && errno)
105     {
106 	err("*ftschildren failed");
107 	exit(1);
108     }
109 
110     for (chunk = 1; ftsent != NULL; ftsent = ftsent->fts_link)
111     {
112 	/*
113 	 * Skip non-files and ctm_smail tmp files (ones starting with `.')
114 	 */
115 	if (ftsent->fts_info != FTS_F || ftsent->fts_name[0] == '.')
116 	    continue;
117 
118 	snprintf(filename, sizeof(filename), "%s/%s", queue_dir,
119 	    ftsent->fts_name);
120 	fd = open(filename, O_RDONLY);
121 	if (fd < 0)
122 	{
123 	    err("*open: %s", filename);
124 	    exit(1);
125 	}
126 
127 	if (run_sendmail(fd))
128 	    exit(1);
129 
130 	close(fd);
131 
132 	if (unlink(filename) < 0)
133 	{
134 	    err("*unlink: %s", filename);
135 	    exit(1);
136 	}
137 
138 	/*
139 	 * Deduce the delta, piece number, and number of pieces from
140 	 * the name of the file in the queue.  Ideally, we should be
141 	 * able to get the mail alias name too.
142 	 *
143 	 * NOTE: This depends intimately on the queue name used in ctm_smail.
144 	 */
145 	npieces = atoi(&ftsent->fts_name[ftsent->fts_namelen-3]);
146 	piece = atoi(&ftsent->fts_name[ftsent->fts_namelen-7]);
147 	err("%.*s %d/%d sent", (int)(ftsent->fts_namelen-8), ftsent->fts_name,
148 		piece, npieces);
149 
150 	if (chunk++ == num_to_send)
151 	    break;
152     }
153 
154     fts_close(fts);
155 
156     return(0);
157 }
158 
159 int
160 fts_sort(const FTSENT * const * a, const FTSENT * const * b)
161 {
162     if ((*a)->fts_info != FTS_F)
163 	return(0);
164     if ((*a)->fts_info != FTS_F)
165 	return(0);
166 
167     return (strcmp((*a)->fts_name, (*b)->fts_name));
168 }
169 
170 /*
171  * Run sendmail with the given file descriptor as standard input.
172  * Sendmail will decode the destination from the message contents.
173  * Returns 0 on success, 1 on failure.
174  */
175 int
176 run_sendmail(int ifd)
177 {
178     pid_t child, pid;
179     int status;
180 
181     switch (child = fork())
182     {
183     case -1:
184 	err("*fork");
185 	return(1);
186 
187     case 0:	/* Child */
188 	dup2(ifd, 0);
189 	execl(_PATH_SENDMAIL, _PATH_SENDMAIL, "-odq", "-t", (char *)NULL);
190 	err("*exec: %s", _PATH_SENDMAIL);
191 	_exit(1);
192 
193     default:	/* Parent */
194 	while ((pid = wait(&status)) != child)
195 	{
196 	    if (pid == -1 && errno != EINTR)
197 	    {
198 		err("*wait");
199 		return(1);
200 	    }
201 	}
202 	if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
203 	{
204 	    err("sendmail failed");
205 	    return(1);
206 	}
207     }
208 
209     return(0);
210 }
211